Magnetic properties of (Cr1-xNix)(3)Te-4 with the pseudo-NiAs-type structure

The magnetic properties of (Cr1-xNix)(3)Te-4 with the pseudo-NiAs-type stru cture have been studied. The ferromagnetic transition temperatures for the compounds are found to decrease linearly with the substitution of Ni for Cr , from their magnetization measurements. At low temperatures below 80 K, th e magnetization decreases with decreasing temperature; i.e., a weak antifer romagnetic component is superimposed on the ferromagnetism of the (Cr1-xNix )(3)Te-4 compounds, and the Neel temperature decreases with Ni substitution for Cr. When the magnetization was measured at higher magnetic field or th e sample was field-cooled, this antiferromagnetic transition became ambiguo us. The experimental results obtained were compared with those for (Cr1-xFe x)(3)Te-4 compounds. (C) 2000 Academic Press.